Glazier&#39;s t-square gage.



To all whom t may cocem Be it known that I, JACOB MIoHA-Lovrrz, a citizen of the United States, residing at 512 Crocker street, Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Glaziers T-Square Gages, of which the following is a specification.

My object is to make a glaziers T square age, and my invention consists of the novel eatures herein shown, descrlbed and claimed.

- Figure 1 is a perspective showing a glaziers T square gage embodying the principles of my invention in use for cutting glass, the glass plate being broken away to economize space. Fig. 2 is a detail top plan view of the T square gage shown in Fig. 1, the view being taken lookin in the direction indicated by the arrow 2 1n Fig. 3. Y Fig. 3 is a edge view looking inthe direction -indicated by the arrow -3 in Fig. 2. Fig. 4-is a fragmentary bottom plan view looking in the direction indicated by the 'arrow' 4 in Fig. 3.

Fig. 5 isa fragmentary top plan view showing an extenslon straight edge applied to the normal straight edge shown in Fig. 2.y

Referring to the drawings in detail, the

Arigid head 1 is rigid with the blade 2. The

v blade 2 consists of parallel bars 3, 4 and 5,

and the ends ofthe bars 3, 4 and 5 have dovetail tongues 6, 7 and 8 lfitting in dovetail slots formed at the center and inner edge of the head1. The head 1 and the bars 3, 4 and 5 are of the same thickness, and the head 1 extends equal distances both ways from the blade as is usual in a T square. The other ends of the bars 3, 4 and 5 areI rigidly connected together by a cross piece 9v having dovetail slots `to receive dovetails extending from the bars and the cross piece 9 is the same thickness as thebars, so that the lhead 1 and blade 2 will lie flat upon a level l surface either side up. In securing the bars s 3, 4 and 5 together by the rigid head 1 and the cross piece 9, the/bars are evenly spaced apart to form longitudinal yparallel slots 10 and 11. The movable head 12 is the same length as the head 1 and substantially twice as wide and somewhat thicker, and the movable head `12 fits upwardly againstthe rigid head 1 and the blade 2, and screw threaded studs 13 andy 14 are .fixed in the movable head 12 in positions to extend through the Specification of Petters Patent. y

Patented Apr.

Application filedl December 30, 1918. Serial No. 268,982.'

` slots-10 and 11,.and `win nuts 15'and 16 fare mounted upon the stu s above the bars 3, 4 andn, so that the head 12 may be moved toj the limits of the slots 10 and '11 and 4 clamped to thel bars 3, 4 and 5. The studs 13A and 14 are fixed in the movable head 12 by inserting the studs upwardly through the'head, embedding the heads of the studs in the head 12, and fastening the studs rigid in place with cement or the like, so that the head 12 is smooth on its lower face.

On the lower side of the rigid head 1 and the blade 2 ,are graduations 17, preferably in inches and fractions of inches, the graduations reading downwardly from'the straight f' outer edge 18 'of the rigid head 1, and the gra'duationsy extending across the lower faces of the bars 3, 4 and 5 on lines parallel with the edge 18, so that by loosening the nuts l15 and 16 and turning the gage bottom upward, the movable head 12 may be accurately set a 4desired distance from the edge 18 with the straightl edge 19 of the movable head parallel with the edge 18, and then the movable head held securely in place by tightening the nuts 15 Vand 16.

If it is desired to cut a piece of glass eleven inches wide, for instance, the edge 19 is set on the eleven inch mark, as in Fig. 4; then the gage may be turned right side up, the edge 19 placed against the plate 2O of glass and a glass cutter moved along the edge 18 to cut the glass. If it is desired to have a straight edge longer than the edge 18 upon the'rigid head 1, an extension strai ht edge 21 may be employed. Screw threa ed studs 22 and'23 are fixed in the rigid head 1 and extend upwardly. The straight edge 21 extension straight .edge rigidly to the rigid head 1. The extension straight edge 21 may be slmply a long slat having a straight edge 26.

The movable head 12 will pass upwardly until the studs 13 and 14l engage the inner face of the rigid head l, and then the edge 19 of the movable head will be iiush with the edge 18 of the rigid head, and when it is desired the movable head 12 may be adjusted any` distance from the edge 18 within limits of the slots 10 and 11.

If the movable head isclamped with thev edge 19 flush with the edge 18, as indicated in dotted lines in Fig. 2, then the whole device may be used as a T square, the ed e 27 upon the movable head 12 being at 'rig t l angles to the edges 28 and 29 of the blade 2.

pon the upper face of the blade 2 there is a series of raduations 30 reading downwardly from-t e edge 27 when the movable head 12 is in position to be used as a T square, said graduations .extending straight across the bars 3, 4 and 5. Various changes may n departing from the splrit of my invention as claimed.

I claim: 1. A glaziers T square age comprising a rigid head, a blade exten lng from one side of the head and having longitudinally extending parallel slots, a movable head tting against the blade, 4studs fixed in the movable head and extending. through'the slots, and clamping nuts upon the studs.

2. A glaziers T square ga e comprising a rigid head; bars extending rom one side of the rigid head and forming a blade having parallel slots, there being graduations reading downwardly from the outer ed e of the rigid head upon the blade; a mova le head ittin against the blade; studs xed in the mova le head and extending through thcs'lots; and nuts upon the studs against the blade, so that the movable head may be accurately adjusted and set relative to the straight edge of the rigid head.

3. A glaziers T square gage comprising a mageos having be nada without l,

in the rigid head; and an extension straight edge adapted lto be mounted upon the studs of the rigid head.

4. A laziers T square gage comprising a rigid ead having a straight outer edge;

bars extending from the rigid head and f forming a blade havin parallel slots, the

ri 'd head and blade emg flush on one si e; afmovable head fitting againstv the lush slde of the blade; studs fixed in the movable head and extending through the slots; and clamping nuts upon the studs, so that the movable head may be moved and clamped into position to form a T square, there being graduations upon the opposite face of the blade reading from the inner face of the movable head when in T square position. i

In testimony whereof l have signed my name to this specification..

JACOB MIoHALoVITz. 

